I must be an idiot :)

[patzi]

I just got this game (anxiously awaiting after the Penumbra series which I was totally addicted to), but I can't seem to get startede. I don't know the interface, how to move....I tried the mouse wheel, nothing. I found the water and the door that won't open but that's it. I can't go anywhere period. I read a walkthrough that said hit the run key....duh where's the run key? I downloaded the game from Amazon so don't have the stuff that came with it, unfortuately. I don't even know how to exit the darn thing. Please don't laugh too much, I'm really an old lady who just is a kid at heart but not as savvy as you guys.